Journal Article

FZJ-2018-06818

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Room- and High-Temperature Flexural Strength of a Stable Solid Oxide Fuel/Electrolysis Cell Sealing Material

Fakouri Hasanabadi, M. ; Faghihi-Sani, M. A. (Corresponding author) ; Kokabi, A. H. ; Groß-Barsnick, S. M.FZJ* ; Malzbender, J.FZJ*

2019
Ceramurgia73399 Faenza

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Please use a persistent id in citations: doi:10.1016/j.ceramint.2018.09.236

Abstract: The structural integrity of the sealing material is critical for the reliability of solid oxide fuel/electrolysis stacks. The current work concentrates on microstructural and mechanical aspects of a sealant material for this application. In particular, the crystallization behavior as a determining factor for the sealants’ mechanical behavior is investigated via high-temperature XRD for 24 h. Furthermore, regarding mechanical properties, three- and four-point bending tests are carried out on sealant bars and head-to-head joined specimens at room- and high-temperatures, yielding in particular relevant fracture stress data. In addition, the elastic modulus is measured by the impulse excitation test from RT to 900 ºC. Tests are done for both as-sintered (as-joined) and annealed samples. The main crystallization appears to happen during the initial joining time. The sealant shows a relatively stable flexural strength in terms of temperature dependency as well as effects of the aging process. In fact, the joined specimens reveal a more than 50% lower flexural strength than glass bars at all temperatures. A complementary finite element simulation indicates the presence of a non-negligible thermal residual stress in joined specimens.

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Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)
2. Zentralinstitut für Technologie (ZEA-1)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)

Appears in the scientific report 2019

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Database coverage:
; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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